i have very limited idea when it comes to these stuffs yet very interested to learn. i'v always wanted to set-up an audio system for my old car (kanang igo ra sad nga dili kaau mka bungol...hehe) so jz dropping by to ask a few questions. which one is better? a targa or kicker sub? (i'm planning to buy a 10")..and why is a capacitor needed for tweeters?